Region-class

Class <code>"Region"</code> is an S4 class containing descriptions of the 
study area. The polygons describing the region are found in the 
coords slot and any gaps are described as polygons in the gaps slot.

classes

Performs distance sampling simulations.It repeatedly generates
instances of a user defined population within a given survey region, generates
realisations of a survey design (currently these must be generated using
Distance software in advance <http://distancesampling.org/>) and simulates
the detection process. The data are then analysed so that the results can
be compared for accuracy and precision across all replications. This will
allow users to select survey designs which will give them the best accuracy
and precision given their expectations about population distribution. Any
uncertainty in population distribution or population parameters can be
included by running the different survey designs for a number of different
population descriptions. An example simulation can be found in the help file for
make.simulation.

Laura Marshall

DSsim

Distance Sampling Simulations

Region-class function

<dl class="dl-horizontal">
<dt><code>region.name</code></dt><dd>Object of class <code>"character"</code>; giving the 
name of the region.</dd></dl><dt><code>strata.name</code></dt><dd>Object of class <code>"character"</code>; character 
vector giving the names of the strata.</dd><dt><code>strata.name</code></dt><dd>Object of class <code>"character"</code>; character 
vector giving the names of the strata.</dd><dt><code>units</code></dt><dd>Object of class <code>"character"</code>; character describing
the coordinate units ("km" or "m")</dd><dt><code>area</code></dt><dd>Object of class <code>"numeric"</code>; the area of the survey
region</dd><dt><code>box</code></dt><dd>Object of class <code>"numeric"</code>; 4 values giving the x and
y ranges of the region</dd><dt><code>coords</code></dt><dd>Object of class <code>"list"</code>; this list contains an
element for each strata. Each of these list elements contains a list of 
polygons defining the region.</dd><dt><code>gaps</code></dt><dd>Object of class <code>"list"</code>;this list contains an
element for each strata. Each of these list elements contains a list of 
gaps in the region</dd>

Slots

Objects can be created by calls of the form
<code>make.region(region.name = "region.name", shapefile = region.shapefile)</code>

Objects from the Class

<dl class="dl-horizontal">
 <dt><code>get.area</code></dt><dd><code>signature(obj = "Region")</code>: retrieves the area 
 element</dd>
 <dt><code>plot</code></dt><dd><code>signature(x = "Region", y = "missing")</code>: plots
 the survey region defined by the object.</dd>
</dl>

Region-class: Class "Region"

Description

Arguments

Slots

Objects from the Class

Methods

See Also